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data-config="" data-state="true"> <div id="pr3mjyzo" class="appMask"></div> <div id="pr3mjyzo" class="appContent"> <div id="pr3mjyzo" class="datum_info"> <h1 class="title">如何正確測量開關(guān)的接觸電阻</h1> <div id="pr3mjyzo" class="bgcolor_01"> <div id="pr3mjyzo" class="bgcolor_sum"> <div id="pr3mjyzo" class="left">日期：2024-11-18 16:35</div> <div id="pr3mjyzo" class="right">瀏覽次數(shù)：218</div> </div> <div id="pr3mjyzo" class="bgcolor_sum01"> 摘要：上?？档请姎饪萍加邢薰?電力技術(shù) </div> </div> <div id="pr3mjyzo" class="content"> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#333333;font-family:宋體, Tahoma, Arial;font-size:14px;background-color:#FFFFFF;"> <strong style="font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:16px;line-height:30px;font-family:微軟雅黑;">如何正確測量開關(guān)的接觸電阻</strong> </p> <p style="margin-top:0px;margin-bottom:0px;padding:0px;color:#333333;font-family:宋體, Tahoma, Arial;font-size:14px;background-color:#FFFFFF;"> <strong style="font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:16px;line-height:30px;font-family:微軟雅黑;"></strong> </p> <p microsoft="" yahei",="" 黑體,="" sans-serif,="" tahoma;="" vertical-align:="" baseline;="" box-sizing:="" border-box;="" color:="" rgb(51,="" 51,="" 51);="" text-align:="" justify;="" white-space:="" normal;="" background-color:="" rgb(255,="" 255,="" 255);"="" style="margin-top: 18px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋體, Tahoma, Arial; background-color: rgb(255, 255, 255); border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px;">　　定義為觸點兩端的電壓與流過一對閉合觸點的電流之比。它遵守歐姆定律。Metal 1和Metal 2之間有一個接口。來自電流源的電流I流過這個接口，可以從電流表中讀取。然后可以從電壓表中將接口上的電壓降讀取為 U。然后可以計算接觸電阻值Rx。 </p> <p microsoft="" yahei",="" 黑體,="" sans-serif,="" tahoma;="" vertical-align:="" baseline;="" box-sizing:="" border-box;="" color:="" rgb(51,="" 51,="" 51);="" text-align:="" justify;="" white-space:="" normal;="" background-color:="" rgb(255,="" 255,="" 255);"="" style="margin-top: 18px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋體, Tahoma, Arial; background-color: rgb(255, 255, 255); border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px;"><br> </p> <p microsoft="" yahei",="" 黑體,="" sans-serif,="" tahoma;="" vertical-align:="" baseline;="" box-sizing:="" border-box;="" color:="" rgb(51,="" 51,="" 51);="" text-align:="" justify;="" white-space:="" normal;="" background-color:="" rgb(255,="" 255,="" 255);"="" style="margin-top: 18px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋體, Tahoma, Arial; background-color: rgb(255, 255, 255); border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px;">　　Rx=U/I </p> <p microsoft="" yahei",="" 黑體,="" sans-serif,="" tahoma;="" vertical-align:="" baseline;="" box-sizing:="" border-box;="" color:="" rgb(51,="" 51,="" 51);="" text-align:="" justify;="" white-space:="" normal;="" background-color:="" rgb(255,="" 255,="" 255);"="" style="margin-top: 18px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋體, Tahoma, Arial; background-color: rgb(255, 255, 255); border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px;"><br> </p> <p microsoft="" yahei",="" 黑體,="" sans-serif,="" tahoma;="" vertical-align:="" baseline;="" box-sizing:="" border-box;="" color:="" rgb(51,="" 51,="" 51);="" text-align:="" justify;="" white-space:="" normal;="" background-color:="" rgb(255,="" 255,="" 255);"="" style="margin-top: 18px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋體, Tahoma, Arial; background-color: rgb(255, 255, 255); border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px;">　　由于接觸電阻隨環(huán)境和電流的通過而變化，因此測量條件應接近使用條件。準確的測量必須使用四端測量技術(shù)和熱電動勢消除技術(shù)。這種間接測量方法可用于測量接觸電阻或回路電阻。它需要三個測試點、三個步驟和三個公式。該方法已被證明是正確的，也可用于校準回路電阻標準。 </p> <p microsoft="" yahei",="" 黑體,="" sans-serif,="" tahoma;="" vertical-align:="" baseline;="" box-sizing:="" border-box;="" color:="" rgb(51,="" 51,="" 51);="" text-align:="" justify;="" white-space:="" normal;="" background-color:="" rgb(255,="" 255,="" 255);"="" style="margin-top: 18px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋體, Tahoma, Arial; background-color: rgb(255, 255, 255); border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px;"><br> </p> <p microsoft="" yahei",="" 黑體,="" sans-serif,="" tahoma;="" vertical-align:="" baseline;="" box-sizing:="" border-box;="" color:="" rgb(51,="" 51,="" 51);="" text-align:="" justify;="" white-space:="" normal;="" background-color:="" rgb(255,="" 255,="" 255);"="" style="margin-top: 18px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋體, Tahoma, Arial; background-color: rgb(255, 255, 255); border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px;">　　接觸電阻測試的典型方法 </p> <p microsoft="" yahei",="" 黑體,="" sans-serif,="" tahoma;="" vertical-align:="" baseline;="" box-sizing:="" border-box;="" color:="" rgb(51,="" 51,="" 51);="" text-align:="" justify;="" white-space:="" normal;="" background-color:="" rgb(255,="" 255,="" 255);"="" style="margin-top: 18px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋體, Tahoma, Arial; background-color: rgb(255, 255, 255); border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px;"><br> </p> <p microsoft="" yahei",="" 黑體,="" sans-serif,="" tahoma;="" vertical-align:="" baseline;="" box-sizing:="" border-box;="" color:="" rgb(51,="" 51,="" 51);="" text-align:="" justify;="" white-space:="" normal;="" background-color:="" rgb(255,="" 255,="" 255);"="" style="margin-top: 18px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋體, Tahoma, Arial; background-color: rgb(255, 255, 255); border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px;">　　四線 (Kelvin) 直流電壓降是使用微歐表進行接觸電阻測試的典型方法，它通過消除自身的接觸電阻和測試引線的電阻來確保更準確的測量。 </p> <p microsoft="" yahei",="" 黑體,="" sans-serif,="" tahoma;="" vertical-align:="" baseline;="" box-sizing:="" border-box;="" color:="" rgb(51,="" 51,="" 51);="" text-align:="" justify;="" white-space:="" normal;="" background-color:="" rgb(255,="" 255,="" 255);"="" style="margin-top: 18px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋體, Tahoma, Arial; background-color: rgb(255, 255, 255); border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px;"><br> </p> <p microsoft="" yahei",="" 黑體,="" sans-serif,="" tahoma;="" vertical-align:="" baseline;="" box-sizing:="" border-box;="" color:="" rgb(51,="" 51,="" 51);="" text-align:="" justify;="" white-space:="" normal;="" background-color:="" rgb(255,="" 255,="" 255);"="" style="margin-top: 18px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋體, Tahoma, Arial; background-color: rgb(255, 255, 255); border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px;">　　接觸電阻測試使用兩個電流連接進行注入和兩個電位引線進行電壓降測量；電壓電纜必須盡可能靠近要測試的連接，并且始終位于由連接的電流引線形成的電路內(nèi)。 </p> <p microsoft="" yahei",="" 黑體,="" sans-serif,="" tahoma;="" vertical-align:="" baseline;="" box-sizing:="" border-box;="" color:="" rgb(51,="" 51,="" 51);="" text-align:="" justify;="" white-space:="" normal;="" background-color:="" rgb(255,="" 255,="" 255);"="" style="margin-top: 18px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋體, Tahoma, Arial; background-color: rgb(255, 255, 255); border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px;"><br> </p> <p microsoft="" yahei",="" 黑體,="" sans-serif,="" tahoma;="" vertical-align:="" baseline;="" box-sizing:="" border-box;="" color:="" rgb(51,="" 51,="" 51);="" text-align:="" justify;="" white-space:="" normal;="" background-color:="" rgb(255,="" 255,="" 255);"="" style="margin-top: 18px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋體, Tahoma, Arial; background-color: rgb(255, 255, 255); border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px;">　　基于對電壓降的測量，微處理器控制的微歐表計算接觸電阻，同時消除連接中熱 EMF 影響可能產(chǎn)生的誤差（熱 EMF 是當兩種不同金屬接觸時產(chǎn)生的小熱電偶電壓）連接在一起）它們將被添加到測量的總電壓降中，如果不通過不同的方法（極性反轉(zhuǎn)和平均，熱電動勢幅度的直接測量等）從測量中減去它們，則會將誤差引入觸點電阻測試。 </p> <p microsoft="" yahei",="" 黑體,="" sans-serif,="" tahoma;="" vertical-align:="" baseline;="" box-sizing:="" border-box;="" color:="" rgb(51,="" 51,="" 51);="" text-align:="" justify;="" white-space:="" normal;="" background-color:="" rgb(255,="" 255,="" 255);"="" style="margin-top: 18px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋體, Tahoma, Arial; background-color: rgb(255, 255, 255); border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px;"><br> </p> <p microsoft="" yahei",="" 黑體,="" sans-serif,="" tahoma;="" vertical-align:="" baseline;="" box-sizing:="" border-box;="" color:="" rgb(51,="" 51,="" 51);="" text-align:="" justify;="" white-space:="" normal;="" background-color:="" rgb(255,="" 255,="" 255);"="" style="margin-top: 18px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋體, Tahoma, Arial; background-color: rgb(255, 255, 255); border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px;">　　如果在小電流下測試斷路器接觸電阻時獲得低電阻讀數(shù)，建議在更高電流下重新測試觸點。為什么我們會受益于使用更高的電流？較高的電流將能夠克服端子上的連接問題和氧化，在這些條件下，較低的電流可能會產(chǎn)生錯誤（較高）的讀數(shù)。 </p> <p microsoft="" yahei",="" 黑體,="" sans-serif,="" tahoma;="" vertical-align:="" baseline;="" box-sizing:="" border-box;="" color:="" rgb(51,="" 51,="" 51);="" text-align:="" justify;="" white-space:="" normal;="" background-color:="" rgb(255,="" 255,="" 255);"="" style="margin-top: 18px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋體, Tahoma, Arial; background-color: rgb(255, 255, 255); border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px;"><br> </p> <p microsoft="" yahei",="" 黑體,="" sans-serif,="" tahoma;="" vertical-align:="" baseline;="" box-sizing:="" border-box;="" color:="" rgb(51,="" 51,="" 51);="" text-align:="" justify;="" white-space:="" normal;="" background-color:="" rgb(255,="" 255,="" 255);"="" style="margin-top: 18px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: 宋體, Tahoma, Arial; background-color: rgb(255, 255, 255); border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; font-size: 15px; line-height: 23px;">　　在接觸電阻測試中保持一致的測量條件非常重要，以便能夠與之前和未來的結(jié)果進行比較以進行趨勢分析。因此，在進行定期測量時，接觸電阻測試必須在相同的位置，使用相同的測試引線（始終使用制造商的校準電纜）和相同的條件下進行，以便能夠知道何時連接、連接、焊接或設(shè)備將變得不**。 </p> </div> <div id="pr3mjyzo" class="datumrelate"> <span>下一篇：</span> <a href="/kangdengdq_Article_11700786.html" title="回路電阻測試儀常見故障及解決辦法">回路電阻測試儀常見故障及解決辦法</a> <br> <span>上一篇：</span> <a href="/kangdengdq_Article_11700788.html" title="分析回路電阻測試儀接線及其原理圖">分析回路電阻測試儀接線及其原理圖</a> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> 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